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1 definition found
 for Cretaceous acid
From The Collaborative International Dictionary of English v.0.48 :

  Cretacic \Cre*tac"ic\
     [Webster 1913 Suppl. +PJC]
     Cretaceous acid,
     an old name for carbonic acid.
     Cretaceous formation (Geol.), the series of strata of
        various kinds, including beds of chalk, green sand, etc.,
        formed in the Cretaceous period; -- called also the chalk
        formation. See the Diagram under Geology.
     Cretaceous period (Geol.), the time in the latter part of
        the Mesozoic age during which the Cretaceous formation was
        deposited, and at the end of which the dinosaurs died out.
        See Cretaceous.
        [1913 Webster +PJC]

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